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https://issues.apache.org/jira/browse/CONNECTORS-1498?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16382103#comment-16382103
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Hiroaki Takasu commented on CONNECTORS-1498:
--------------------------------------------

I found some pages about what protocol JCIFS supports.
 * [https://lists.samba.org/archive/jcifs/2013-December/010123.html]
 * 
[http://samba.2283325.n4.nabble.com/Query-regarding-the-SMB-support-td4697093.html]

According to this pages, JCIFS supports only SMBv1 and has no plan to 
improve/update for supporting SMBv2/v3...

So I think Windows Share Connector uses SMBv1.

> Support SMBv2/v3 protocol for Windows Shares connector
> ------------------------------------------------------
>
>                 Key: CONNECTORS-1498
>                 URL: https://issues.apache.org/jira/browse/CONNECTORS-1498
>             Project: ManifoldCF
>          Issue Type: Improvement
>          Components: JCIFS connector
>         Environment: OS: CentOS 7.2
> ManifoldCF: 2.8.1
>            Reporter: Hiroaki Takasu
>            Assignee: Karl Wright
>            Priority: Major
>
> Windows Shares connector  (JCIFS connector) uses 
> [JCIFS|https://jcifs.samba.org/] library which supports only samba protocol 
> v1.
> But many file servers were disabled SMBv1 by vulnerability 
> [MS17-010|https://docs.microsoft.com/en-us/security-updates/SecurityBulletins/2017/ms17-010],
>  so we can not use Windows Shares connector.
> I hope that ManifoldCF support SMBv2/v3 with other CIFS library (e.g. 
> [smbj|https://github.com/hierynomus/smbj])



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